road noise

Magic Bus

Cabin noise

I dynamatted the doors & hatch (took me about 3 1/2 hrs) and it has helped. I'm fine with the car at this noise level but will change my tires to the Super Sports when the originals wear down a little more.

Hopefully I did this right, above is a link about cabin noise. There is also a DIY somewhere about it.

b15

x2

This won't make it Lexus quiet, but it does eliminate the 'hollowness' of the Z. Before I did it, the hatch sounded like a tin can when the wheels kicked up small rocks. Afterwards the tin can noise was eliminated.

Vegas_370

Dynamatted hatch and doors. Installed 2" foam in hatch. Replaced Yoko tires with Pilot Super Sports. Noise is down about 6 dB. Still sounds gravely on smooth asphalt and harsher sounding on grooved concrete slabs.

I checked the firewall and there is factory 3/8" pad that goes under seats.

I think some the noise is coming through door seals (they are good and tight).

Too bad more can be done to cut the noise.

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Michelin Pilot Super Sport tires. Sprint Booster (no more throttle lag). Dynamat and acoustic foam. Invidia Gemini CBE. Mishimoto intakes.